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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
ssize_t
ngx_wsasend(ngx_connection_t *c, u_char *buf, size_t size)
{
int n;
u_long sent;
ngx_err_t err;
ngx_event_t *wev;
WSABUF wsabuf;
wev = c->write;
if (!wev->ready) {
return NGX_AGAIN;
}
/*
* WSABUF must be 4-byte aligned otherwise
* WSASend() will return undocumented WSAEINVAL error.
*/
wsabuf.buf = (char *) buf;
wsabuf.len = size;
sent = 0;
n = WSASend(c->fd, &wsabuf, 1, &sent, 0, NULL, NULL);
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
"WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size);
if (n == 0) {
if (sent < size) {
wev->ready = 0;
}
c->sent += sent;
return sent;
}
err = ngx_socket_errno;
if (err == WSAEWOULDBLOCK) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err, "WSASend() not ready");
wev->ready = 0;
return NGX_AGAIN;
}
wev->error = 1;
ngx_connection_error(c, err, "WSASend() failed");
return NGX_ERROR;
}
ssize_t
ngx_overlapped_wsasend(ngx_connection_t *c, u_char *buf, size_t size)
{
int n;
u_long sent;
ngx_err_t err;
ngx_event_t *wev;
LPWSAOVERLAPPED ovlp;
WSABUF wsabuf;
wev = c->write;
if (!wev->ready) {
return NGX_AGAIN;
}
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
"wev->complete: %d", wev->complete);
if (!wev->complete) {
/* post the overlapped WSASend() */
/*
* WSABUFs must be 4-byte aligned otherwise
* WSASend() will return undocumented WSAEINVAL error.
*/
wsabuf.buf = (char *) buf;
wsabuf.len = size;
sent = 0;
ovlp = (LPWSAOVERLAPPED) &c->write->ovlp;
ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
n = WSASend(c->fd, &wsabuf, 1, &sent, 0, ovlp, NULL);
ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
"WSASend: fd:%d, %d, %ul of %uz", c->fd, n, sent, size);
wev->complete = 0;
if (n == 0) {
if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
/*
* if a socket was bound with I/O completion port then
* GetQueuedCompletionStatus() would anyway return its status
* despite that WSASend() was already complete
*/
wev->active = 1;
return NGX_AGAIN;
}
if (sent < size) {
wev->ready = 0;
}
c->sent += sent;
return sent;
}
err = ngx_socket_errno;
if (err == WSA_IO_PENDING) {
ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
"WSASend() posted");
wev->active = 1;
return NGX_AGAIN;
}
wev->error = 1;
ngx_connection_error(c, err, "WSASend() failed");
return NGX_ERROR;
}
/* the overlapped WSASend() complete */
wev->complete = 0;
wev->active = 0;
if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
if (wev->ovlp.error) {
ngx_connection_error(c, wev->ovlp.error, "WSASend() failed");
return NGX_ERROR;
}
sent = wev->available;
} else {
if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &wev->ovlp,
&sent, 0, NULL)
== 0)
{
ngx_connection_error(c, ngx_socket_errno,
"WSASend() or WSAGetOverlappedResult() failed");
return NGX_ERROR;
}
}
ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
"WSAGetOverlappedResult: fd:%d, %ul of %uz",
c->fd, sent, size);
if (sent < size) {
wev->ready = 0;
}
c->sent += sent;
return sent;
}
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